Many of the early backers of the Nazi regime were people who were able to get control of valuable industrial property and manufacturing equipment during the Weimar hyperinflation. Iirc, it's detailed in Albert Speer's book.
Inflation reduces the value of things priced in the currency, so the 'mortgage' is a financial product and so is worthless.
But try this: who is going to lend money to anyone to buy a home when the mortgage will be worthless in a few months?
Nobody!
The financial/credit system collapses so there are no real long term gains really.
You become 'more wealthy than your peers'. But in reality, it's crap for everyone. You become 'much less wealthy relative to everyone outside the country'.
Depends on what one values :)
Not true, the price will go up to track currency devaluation unless the price was pegged via contract or legislation. Even bread will see its price go up many times in day